523 幅200mm異径双ロールキャスターの試作(半溶融・半凝固加工の動向とその展開)

概要

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In this study, strip casting of 6022 aluminum alloy strip was tried using an unequal diameter twin roll caster. The diameter of the large roll is 1000mm and the small roll is 300mm, and the width of the rolls is 200mm. Aluminum alloy strip easily sticks to a steel roll. Therefore, lubricant is usually used to prevent the strip-sticking. However, aluminum alloy coating was operated on the roll surface to prevent the strip-sticking instead of the lubricant in this study. The melt was poured near the side-dam-plate to prevent the solidification of the melt at the side-dam-plate. 6022 strip was cast at the speed of 30m/min. The strip thickness was 4mm. This method was able to show possibility of the continuous casting of the strip with 200mm-width. The as-cast strip could be cold-rolled down to 1mm without homogenization. 180-degrees-bending-test was operated to the T4-heattreated 1mm-thick-strip to investigate the ability of the hem-forming. The crack was not seen on the outer surface of the strip.
2007-11-16